The Persian Gulf, as a strategic and sensitive region from an economic, political and security point of view, faces many challenges, among which are the effects of climate on the security and stability of the islands of this area. In this research, first, through the theoretical framework and the analysis of past studies related to land use, various aspects of security, including economic, social and military security, were analyzed in terms of its relationship with climate,Then, using bioclimatic indicators such as humidity-temperature index (THI), wind chill index (WCI) and equivalent effective temperature index (EET), the climatic condition of these islands was analyzed. It deals with climate threats and creating ways of regional cooperation for crisis management and providing security,The results show that the existence of infrastructure resistant to climate change, the creation of educational programs for residents and the formation of regional cooperation can be effective in improving the security and defense situation of the Persian Gulf Islands. The effects of climate and the need for adaptation as well as the design of comprehensive policies in line with the security and sustainable defense of the islands of this region are emphasized.